Update cheatsheets

pbzip2

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pbzip2
+
+> A parallel implementation of the `bzip2` file compressor.
+> See also: `bzip2`, `tar`.
+> More information: <https://manned.org/pbzip2>.
+
+- Compress a file:
+
+`pbzip2 {{path/to/file}}`
+
+- Compress a file using the specified number of processors:
+
+`pbzip2 -p{{4}} {{path/to/file}}`
+
+- [d]ecompress a file:
+
+`pbzip2 --decompress {{path/to/compressed_file.bz2}}`
+
+- Display help:
+
+`pbzip2 -h`